[New-bugs-announce] [issue36222] ValueError: a coroutine was expected with asyncio.run

[Rémy Hubscher [:natim]]

New submission from Rémy Hubscher [:natim] <hubscher.remy at gmail.com>:

Refs: https://github.com/Martiusweb/asynctest/issues/114

I was trying to mock a `asyncio.run(asyncio.gather())` call and I discovered that while it was working with `loop.run_until_complete` it wasn't with `asyncio.run`

Is there a reason for this difference of behaviour?

```
import asyncio
from unittest.mock import Mock


class AsyncMock(Mock):

    def __call__(self, *args, **kwargs):
        sup = super(AsyncMock, self)
        async def coro():
            return sup.__call__(*args, **kwargs)
        return coro()

    def __await__(self):
        return self().__await__()

mocked_function = AsyncMock()

asyncio.run(asyncio.gather(mocked_function()))
```

```
import asyncio
from unittest.mock import Mock


class AsyncMock(Mock):

    def __call__(self, *args, **kwargs):
        sup = super(AsyncMock, self)
        async def coro():
            return sup.__call__(*args, **kwargs)
        return coro()

    def __await__(self):
        return self().__await__()

mocked_function = AsyncMock()

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.gather(mocked_function()))
```

----------
components: asyncio
messages: 337374
nosy: asvetlov, natim, yselivanov
priority: normal
severity: normal
status: open
title: ValueError: a coroutine was expected  with asyncio.run
versions: Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36222>
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